We currently have a large on-going program (Go Program 11644, 120 orbits) to exploit the superb stability and photometric characteristics of HST and the broad range in wavelength coverage of the WFC3 to make broad-band vis/IR spectral observations of a large sample of Kuiper belt objects. Though the survey is currently only ~50% complete, the quality and unprecedented signal-to-noise of these observations has revealed the existence of a previously undiscovered spectral variability not explainable within our current understanding of these objects. A possible explanation for this variability is that with this faint set of Kuiper belt objects, we are beginning to see the difference between larger differentiated objects and smaller non-differentiated objects. Its seems that the small and likely undifferentiated objects are exhibiting silicate features that affect our photometry - features not exhibited by the icy mantles of larger icy bodies. We propose a small add-on survey to dramatically increase the scientific results of our large program. The proposed observations will use the proven capabilities of WFC3 to make broad and narrow-band photometric observations to detect spectral features in the 1.0-1.3 micron range of a small subset of our sources. The 13 targets have been carefully selected to cover the range of spectral variability detected in our large program as well as sample the entire dynamical range and physical sizes of these targets. These observations will allow the identification of undifferentiated Kuiper belt objects by detection of their silicate features. As a probe for differentiation, these observations could constrain the natal locations of different Kuiper belt classes, a constraint currently unavailable to formation models. This small set of observations will allow the calibration of the spectral variability seen in our large program, and drastically enhance the scientific output of our full Cycle 17 sample.

The goal of this proposal is to obtain five band photometry of 13 Kuiper belt objects. The five bands are 606W and 775W from WFC3/UVIS and 098M, 101W, and 127M from WFC3/IR. Images are obtained twice in each filter with a 3 arcsecond nod between the positions. All images of a target are to be obtained during a single orbit per target 12 false 0.0 0.0 false false false false false false SUPPORTED SOLAR SYSTEM F606w mag. = 21.72 ASTEROID 2007 OR10 KBO TYPE=ASTEROID,A=67.2923533,E=0.4995695,I=30.67651,O=336.86873,W=207.32574,M=100.3854,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH SOLAR SYSTEM F606w mag = 22.01 ASTEROID 1999 TD10 KBO TYPE=ASTEROID,A=99.983781895,E=0.877010544576,I=5.95524308607,O=184.673632221,W=172.749741672,M=0.551057344742,EQUINOX=J2000,EPOCH=15-MAY-2001:00:00:00 EARTH SOLAR SYSTEM F606w mag = 23.22 ASTEROID 2004 QQ26 KBO TYPE=ASTEROID,A=22.9261069,E=0.1479139,I=21.4745,O=197.61167,W=355.35129,M=32.39997,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH SOLAR SYSTEM F606w mag = 23.04 ASTEROID 2001 QX322 KBO TYPE=ASTEROID,A=58.0118114412,E=0.385014182246,I=28.5038930422,O=255.021899131,W=65.7728552719,M=19.6510933269,EQUINOX=J2000,EPOCH=02-FEB-2002:00:00:00 EARTH SOLAR SYSTEM F606w mag = 22.28 ASTEROID 1998 SM165 KBO TYPE=ASTEROID,A=48.1116897256,E=0.374405650157,I=13.4660334133,O=183.111708636,W=131.999777707,M=27.0809363221,EQUINOX=J2000,EPOCH=02-MAY-2000:00:00:00 EARTH SOLAR SYSTEM F606w mag = 24.14 ASTEROID 2000 OH67 KBO TYPE=ASTEROID,A=43.9492238925,E=0.0148428017429,I=5.63221310706,O=77.9022552177,W=189.989892136,M=52.2795027281,EQUINOX=J2000,EPOCH=05-JAN-2003:00:00:00 EARTH SOLAR SYSTEM F606w mag = 22.73 ASTEROID 1999 RB216 KBO TYPE=ASTEROID,A=47.3107704382,E=0.289182025292,I=12.7130214445,O=175.743521063,W=209.009290312,M=349.179736059,EQUINOX=J2000,EPOCH=22-SEP-2004:00:00:00 EARTH SOLAR SYSTEM F606w mag. = 22.82 ASTEROID 2000 WT169 KBO TYPE=ASTEROID,A=45.095929455,E=0.00959039639707,I=1.7435776232,O=110.515755743,W=255.960524975,M=63.6139035538,EQUINOX=J2000,EPOCH=17-APR-2003:00:00:00 EARTH SOLAR SYSTEM F606w mag = 23.34 ASTEROID 2001 QX297 KBO TYPE=ASTEROID,A=44.4118317,E=0.0318654,I=0.90921,O=279.44555,W=103.15348,M=318.66691,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH SOLAR SYSTEM F606w mag = 22.79 ASTEROID 2002 PV170 KBO TYPE=ASTEROID,A=42.9336451,E=0.0195137,I=1.2719,O=88.46841,W=270.70241,M=338.93792,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH SOLAR SYSTEM F606w mag = 23.40 ASTEROID 2001 PK47 KBO TYPE=ASTEROID,A=40.0051301,E=0.0692982,I=8.72769,O=248.02606,W=166.1572,M=329.69814,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH SOLAR SYSTEM F606w mag = 21.12 ASTEROID 2004 EW95 KBO TYPE=ASTEROID,A=39.3124985,E=0.3143208,I=29.31959,O=25.74413,W=204.87637,M=348.62958,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH SOLAR SYSTEM F606w mag = 22.99 ASTEROID 2005 TV189 KBO TYPE=ASTEROID,A=39.4745753,E=0.1899159,I=34.37792,O=246.19942,W=184.96819,M=5.25355,EQUINOX=J2000,EPOCH=23-JUL-2010:00:00:00 EARTH POS-TARG DITHER 3.0 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 1 false POS-TARG DITHER 3.0 LINE false false 2 41.788 WFC3-IR-DITHER-LINE 2 false Using ephemeris for target 12234-01-2007OR10 ephemeris data for target 12234-01-2007OR10 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. 1284824622000 66.96122821559419 (Tic-Visit :proposal-id 12234 :visit-id "01" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-02-1999TD10 ephemeris data for target 12234-02-1999TD10 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. 1283900249000 267.74831505833725 (Tic-Visit :proposal-id 12234 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-03-2004QQ26 ephemeris data for target 12234-03-2004QQ26 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. 1284603988000 96.53777782951221 (Tic-Visit :proposal-id 12234 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-04-2001QX322 ephemeris data for target 12234-04-2001QX322 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "04" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:32.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-05-1998SM165 ephemeris data for target 12234-05-1998SM165 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "05" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-06-2000OH67 ephemeris data for target 12234-06-2000OH67 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "06" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:38.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-07-1999RB216 ephemeris data for target 12234-07-1999RB216 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "07" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:40.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-08-2000WT169 ephemeris data for target 12234-08-2000WT169 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "08" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-09-2001QX297 ephemeris data for target 12234-09-2001QX297 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. 1284979928000 62.7002740207939 (Tic-Visit :proposal-id 12234 :visit-id "09" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-10-2002PV170 ephemeris data for target 12234-10-2002PV170 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "10" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-11-2001PK47 ephemeris data for target 12234-11-2001PK47 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "11" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-12-2004EW95 ephemeris data for target 12234-12-2004EW95 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "12" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Using ephemeris for target 12234-13-2005TV189 ephemeris data for target 12234-13-2005TV189 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 10.182 to 12.060. ephemeris interval: 10.212 to 12.214 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12234 :visit-id "13" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) true 1 0 Repeat of failed visit 03. (Tic-Visit :proposal-id 12234 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "20-Aug-2010 09:26:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 436368 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12234 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12234 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2901 :al-overhead-at-end 0 :internal-dur-at-end 566 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3234 :pcs-gap 0 ) false 1 0